add example to revm crate (#468)

README.md

@@ -26,7 +26,7 @@ Last checked revm requires rust v1.65 or higher for `core::error::Error`
 There were some big efforts on optimization of revm:
 * Optimizing interpreter loop: https://github.com/bluealloy/revm/issues/7
 * Introducing Bytecode format (and better bytecode analysis): https://github.com/bluealloy/revm/issues/121
-* Unification of instruction signatures: https://github.com/bluealloy/revm/pull/283 
+* Unification of instruction signatures: https://github.com/bluealloy/revm/pull/283
 
 # Running eth tests
 
@@ -48,6 +48,12 @@ cargo run --package revm-test --release --bin snailtracer
 cargo flamegraph --root --freq 4000 --min-width 0.001 --package revm-test --bin snailtracer
 ```
 
+## Running example
+
+```shell
+cargo run -p revm --features ethersdb --example fork_ref_transact
+```
+
 # Used by:
 
 * Foundry: https://github.com/foundry-rs/foundry

crates/revm/Cargo.toml

@@ -28,9 +28,12 @@ ethers-providers = { version = "2.0", optional = true }
 ethers-core = { version = "2.0", optional = true }
 futures = { version = "0.3.27", optional = true }
 
-
 [dev-dependencies]
 hex-literal = "0.4"
+ethers-contract = { version = "2.0.3", default-features = false }
+hex = "0.4.3"
+bytes = "1.4.0"
+anyhow = "1.0.70"
 
 [features]
 default = ["std", "secp256k1"]
@@ -57,3 +60,7 @@ arbitrary = ["revm-interpreter/arbitrary"]
 # deprecated feature
 web3db = []
 with-serde = []
+
+[[example]]
+name = "fork_ref_transact"
+path = "../../examples/fork_ref_transact.rs"

examples/fork_ref_transact.rs

@@ -1,16 +1,14 @@
-use std::{str::FromStr, sync::Arc};
 use anyhow::{Ok, Result};
 use bytes::Bytes;
-use ethers::{
-    abi::parse_abi,
-    prelude::BaseContract,
-    providers::{Http, Provider},
-};
+use ethers_contract::BaseContract;
+use ethers_core::abi::parse_abi;
+use ethers_providers::{Http, Provider};
 use revm::{
     db::{CacheDB, EmptyDB, EthersDB},
     primitives::{ExecutionResult, Output, TransactTo, B160, U256 as rU256},
     Database, EVM,
 };
+use std::{str::FromStr, sync::Arc};
 
 #[tokio::main]
 async fn main() -> Result<()> {